I am skeptical of smart TVs and smart fridges and the like, but I like having an embedded Netflix/Youtube app because it's not harming me any -- provided the UI is snappy, the UX is good, the TV isn't spying on my pixels -cough- Vizio -cough-, and it doesn't go away like it did here.
I know these are generous assumptions, but if it saves me from having to Bring My Own Streaming Stick and I have no particular brand loyalty and/or ecosystem investment like AppleTV, Amazon, Google Play Store, PlayStation Store, then fine. It's only harmful when it doesn't work as intended, of when my 'smart' TV is so obsolete that it's no longer functional as a 'dumb' TV.
The problem is every TV manufacturer suddenly pulled a Windows 10 and thought to themselves: "Everyone already has our products in their homes, why don't we try to monetize this further? Otherwise we'll never beat Google and Apple!" So they're all trying to build 'platforms' and 'ecosystems' and the like, which is terrible value for the person who doesn't want to re-buy the same DRM'ed movie on four different platforms.
Luckily, more and more of these homegrown smart TV platforms are dying out in favor of Android/Google TV (whatever they keep renaming it to), Roku's licensed software, and Sony's PlayStation ecosystem.